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A photon of wavelength 6630 Å is incident on a totally reflecting surface. The momentum delivered by the photon is equal to
|
(a) 6.63 × 10–27 kg-m/sec |
(b) 2 × 10–27 kg-m/sec |
(c) 10–27 kg-m/sec |
(d) None of these |
The length of Milky way is
|
(a) 100,000 light years |
(b) 10,000 light years |
(c) 1000 light years |
(d) 100 light years |
Intensity of magnetic field due to earth at a point inside a hollow steel box is
|
(a) Less than outside |
(b) More than outside | (c) Same | (d) Zero |
Due to the earth's magnetic field, charged cosmic ray particles
| (a) Require greater kinetic energy to reach the equator than the poles |
|
(b) Require less kinetic energy to reach the equator than the poles |
| (c) Can never reach the equator |
| (d) Can never reach the poles |
Select the right option in the following
|
(a) Christian Huygens a contemporary of Newton established the wave theory of light by assuming that light waves were transverse |
|
(b) Maxwell provided the compelling theoretical evidence that light is transverse wave |
|
(c) Thomas Young experimentally proved the wave behaviour of light and Huygens assumption |
|
(d) All the statements give above, correctly answers the question “what is light” |
Which rays are not the portion of electromagnetic spectrum
|
(a) X-rays |
(b) Microwaves |
(c) a-rays |
(d) Radio waves |
The phenomenon of light bending due to change of medium is called: